ASTM A387 Grade 2 Steel vs. SAE-AISI 8620 Steel
Both ASTM A387 grade 2 steel and SAE-AISI 8620 steel are iron alloys. Their average alloy composition is basically identical. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 2 steel and the bottom bar is SAE-AISI 8620 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 140 to 170 | |
| 150 to 210 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 25 | |
| 13 to 31 |
| Fatigue Strength, MPa | 190 to 250 | |
| 270 to 360 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 73 |
| Shear Strength, MPa | 300 to 350 | |
| 340 to 420 |
| Tensile Strength: Ultimate (UTS), MPa | 470 to 550 | |
| 520 to 690 |
| Tensile Strength: Yield (Proof), MPa | 260 to 350 | |
| 360 to 570 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 250 |
| Maximum Temperature: Mechanical, °C | 420 | |
| 410 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1460 |
| Melting Onset (Solidus), °C | 1420 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 45 | |
| 39 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.2 | |
| 7.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.3 | |
| 8.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 2.6 |
| Density, g/cm3 | 7.9 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 1.5 |
| Embodied Energy, MJ/kg | 20 | |
| 20 |
| Embodied Water, L/kg | 50 | |
| 50 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 120 | |
| 86 to 150 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 180 to 320 | |
| 340 to 880 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 20 | |
| 18 to 24 |
| Strength to Weight: Bending, points | 17 to 19 | |
| 18 to 22 |
| Thermal Diffusivity, mm2/s | 12 | |
| 10 |
| Thermal Shock Resistance, points | 14 to 16 | |
| 15 to 20 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.21 | |
| 0.18 to 0.23 |
| Chromium (Cr), % | 0.5 to 0.8 | |
| 0.4 to 0.6 |
| Iron (Fe), % | 97.1 to 98.3 | |
| 96.9 to 98 |
| Manganese (Mn), % | 0.55 to 0.8 | |
| 0.7 to 0.9 |
| Molybdenum (Mo), % | 0.45 to 0.6 | |
| 0.15 to 0.25 |
| Nickel (Ni), % | 0 | |
| 0.4 to 0.7 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.035 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0.15 to 0.35 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.040 |